Machine for cutting noncircular glasses



A. STEINLE. I MACHINE FOR CUTTING NONCIIICULAB GLASSES. APPLICATION FILED AUG. I3; I92I- 141,492. Y PatentedJune"6,19z2.

enirsosraras earner ortica..

AnoLr srnrnLn, or JENA; GERMANY, assrenon ro frire rima or 'CARL zeiss, or

' JENA, GERMANY'.

MACHINE FOB. CUTTING NONCIRCULAR GLASSES.

Specification of Letters'atent. Patented Jim@ 6, 1922.

Application filed August 13, 1923.. Serial No. 492,125.

To all whom may cof/wem.'

Be it lnovfn that l, toom? S'rEnvLia, a citi- ;en'of the German Empire, residing at Jena, Germany, have invented a new and useful Machine 'for Cutting Noncircular Glasses (for which l have tiled an application in Germany hoveinber 2l., 1919, and in Eng-- ing curve, but by in-terposing a two-armed lever having` a displaceable centre ot' rotation. Thus a two-armed lever isrcaused to engage with a slide, Which carries the cutting tool and is adapted to move radially relatively to the axis ot the table, which lever plays in a plane containing' the axis ot the table and the other end of Which is guided in a plane er cylindricalV guiding curve ot a member coupled with the table. the centre of rotation oit this two-armed lever beine; arranged so as to be adjustable in the direction ofk its longitudinal axis. The' total throiv of. the yguiding curve will be so selected that in conjunction with theo'tlier dimensions ol the machine the greatest re-` quired radial difference can be reached. By displacing the centre ot rotation of the twoarmed lover it is then possible to. transmit the path prescribed by the guiding curve 'of one lever arm to any scale to the end of the second lever arm engaging' the tool slide and thus Within the range chosen any required radial difference of the glass term to be cut can be set in a. simple manner. Preferably the arrangement Will be such'thatthe point ot rotation ol the two-armed lever may be shifted tar as that en d of the lever ivvhich `guides the tool slide'.A It is thus possible to use the machine conveniently for cutting circular `.glasses Without having to remove A the member bearing the guiding curve, as

with the point of rotation of the lever'in this eXtreme position for any guiding curve the tool slide will remain stationary during the rotation of the table. The distance of L2 2 of Fig, 1.-

' the cutting ytool from the axis of rotation of the table will, off course, always be made so as to be variable independent ot the curved guioe in any known manner7 so that the Inachine inay be set to out a glass any size, Whatever its torni. "It is thus necessary, be-V fore usingthe machine, to make tivo adjustments, vin on the one hand the required radial difference with the aid of a mark indicating` the position oit the centre of rotation of tlielever. Iand on the other hand the required size of the glass With 'the aid of' a second mark, which Aindicates the position Aof the cutting' tool. relative to its slide..v Preferably'numbered scales will be used for both adjusting motions, so that, `for instance, the

" glass dimensions resulting for the different scale values a table.

The twofold symmetrical 'form in general use for spectacle `glasses necessitates atwofold symmetrical form for the guiding curve as WelLmVVhen glasses are to be cut,` that can be arranged in the form oi" are symmetrical only in one direct-ion, 'the guiding curve` must be replaced by one lot a Correspouding` 'single symmetrical `oi1n-- Hence the member car ying the guiding curve will preferably be made interchangeable, so that with the saine machine glasses .may also be cut, having a single symmetrical form, and, `when required,` 'glasseshaving' no axis ot symmetry at all. `Th`e member carrying;` "thenuiding curve, vwhich will generally be built into the innerjiiart of 'the machine, so as'to keep it free oit dust and the like, will'preferably be so formed that the shape oiE .its guiding curve may be shown on an outwardly projecting part of the member.

In the drawing' a constructional example of the invention is shown, in which the rotatable table `is operated from ahorizontal axis and the member carrying the `guiding curve is mounted lon the said axis; y Filnyl is a'lonlgitudinal section through the Whole machine and Fig'. 2 a section alongV` line The machine has a casing 'al of substantially bell-like shape, which on its upper. surface land concentricfvvith the axis of the casing" carriles a rotatable table l) with a rubber support `o corresponding to the outer surface of the 'glass e to be cut. The table b forms 'one piece With its'airle 1, which extends into the interior of the cas-` ing and onto which and co-axially With" it a bevel-wheel d having a long guiding bush 

